Question

What is the formula for barium phosphate $?$

Answer 1

Hint: First we have to know that Barium sulphate is an inorganic ionic compound. Then to find the formula for any substance, we need to first know the names of the elements and a few basic rules allows us to name simple compounds. To find the formula of an ionic compound, first identify the cation and write down its symbol and charge. Then, identify the anion and write down its symbol and charge. Finally, combine the two ions to form a neutral compound.

Complete answer:
A chemical formula is a notation used to show the number and type of atoms present in a substance, using the atomic symbols and numerical subscripts. It provides a way to represent any substance using the symbol of the elements present in it. Ionic compounds are formed by combining the cations and anions in such a way that the net charge contributed by the total number of cations exactly cancels the net charge contributed by the total number of anions. Hence, ionic compounds are electrically neutral.
In a Barium phosphate, the cation is barium ( $B{a}^{2+}$ ) with valency $2$ and the anion is phosphate ( $P{O}_4^{3-}$ ) with valency $3$ . The chemical or molecular formula of Barium phosphate is $B{a}_3{\left(P{O}_4\right)}_2$ .

Note:
Barium phosphate is widely used in the production of the pulsed laser and glasses. It is inflammable and does not dissolve in water. It can cause eye and skin irritation. Also note that the empirical formula of a compound is the simplest whole number ratio of atoms of each element in the compound.